A comet's tail always points away from the sun.
2
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
Sound doesn't travel in space.
255
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
Only 55% of Americans know that the sun is a star.
986
The earth travels through space at 660,000 miles per hour.
189
41% of the moon is not visible from earth at any time.
103